FEATURED PRODUCTS
SALE
Tested and verified concentration for commercial and home usage.
Double sealed bags/bottles to prevent leaks and safe transit.
Penrite
In stock
Couldn't load pickup availability
Marine Inboard Four Stroke 25W-40 is a premium mineral NMMA (National Marine Manufacturers Association) FC-W®, fully licensed and registered petrol engine oil. It contains advanced low ash anti-wear additives combined with specialised rust inhibitors to provide optimum engine protection in marine and salt water environments.
Marine Inboard Four Stroke 25W-40 is designed for use in inboard/outboards and stern drive petrol engines. It can be used where SAE 25W-40 and SAE 30 oils are required and where FC-W® and FC-W (CAT)® products are specified by the manufacturer. It is especially suitable for:
Mercruiser Chevrolet Chrysler Indmar Tohatsu
Mariner OMC Nissan PCM Volvo Penta
Marine Inboard Four Stroke 25W-40 may be used in some modern petrol engine cars that require API SL oils. Diesel fuelled engines should use the appropriate Penrite diesel oil.
Manufacturer's (OEM) Approvals & Industry Licenses
Product Performance Levels
API SL
China National GB 11121-2006
NMMA FC-W®
| Colour | Amber |
| Density at 15°C, kg/L | 0.889 |
| Viscosity, Kinematic, cSt at 40°C | 138 |
| Viscosity, Kinematic, cSt at 100°C | 14.9 |
| Viscosity Index | 109 |
| Cold Cranking Viscosity, cP at -10°C | 5722 |
| Zinc, Mass % | 0.085 |
| Phosphorus, Mass % | 0.077 |
| Sulphated Ash, Mass % | 0.77 |
| Total Base Number (TBN) | 7.4 |
Standard delivery within Australia is usually completed within 3–7 business days. Express shipping options are available at checkout. Full rates and tracking information will be provided in your confirmation email.
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at info@bosca.com.au. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at info@bosca.com.au.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items or gift cards.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.
